公路隧道与辅助通道交叉结构稳定性分析

随着特长隧道的增多，辅助通道不可避免的会出现交叉情况，如何解决交叉连接局部区域应力集中、结构受力复杂等问题越来越重要。基于此，以宝塔山隧道#2风机房辅助通道十字交叉结构工程为依托，运用ADINA有限元软件对不同工况下的辅助通道十字交叉结构进行模拟对比分析，得到了采用喷射聚丙烯纤维混凝土作为隧道支护结构风机房辅助通道十字交叉段内围岩变形及范围、裂缝分布及破坏类型、接触应力分布形态等力学特征。

Analysis on Stability of Crossing Structure between Highway Tunnel and Auxiliary Channel

With the increase of extra-long tunnels, the auxiliary channel will inevitably have a crossover situation. It is of great significance to solve the problem of stress concentration in the local area of the cross-connection and complex structural forces. Based on the cross structure of the auxiliary channel of #2 fan room of Baotashan Tunnel, this paper uses ADINA finite element software to simulate and analyze the cross structure of auxiliary channel under different working conditions. The deformation and range of surrounding rock, the distribution of cracks and the type of failure, as well as the distribution of contact stress distribution in the cross section of the auxiliary channel of the fan room using the sprayed polypropylene fiber concrete as the tunnel support structure are obtained.It can provide references for similar projects design and construction in the future.